Double-compressor air-source heat pump heating and heat supply system

ABSTRACT

The present invention includes a unit part, a heating part, a heat supply part, and an intelligent control part. The unit part includes an air-source heat pump heating part, an electric heating part, a water pipeline fittings part and a control circuit part. The control circuit part can control the heating part to use different compressor according to the temperature of water and environment; if the outflow temperature cannot reach the standard that the electric heating part would work according to the difference of inflow and outflow temperature as well as the flow quantity, to the contrary, it won&#39;t work; if both of the air-source heat pump part and the control circuit part worked but the temperature still cannot reach the set temperature that the water flow regulating valve will used to make the water stay in constant temperature.

TECHNICAL FIELD

The present invention relates to the double-compressor air-source heat pump heating and heat supply field, and more especially, to an out-of-the-box double-compressor air-source heat pump heating and heat supply system with intelligent control.

DESCRIPTION OF THE RELATED ART

The traditional double-compressor air-source heat pump heating and heat supply system generally consists of three parts, namely the main engine, the water tank, and the heating system; for a household water tank, first, water tanks with a general capacity of 150 to 320 L have a huge size and will occupy a very large part of building area when being installed, and even if some are mounted outside the wall with supports, due to the weight of the tank itself and the water added in, this installation method is quite dangerous; second, as to the material and technology for the tank liner, no matter whether it is stainless or enameled, owing to the deficiency of the manufacturing technology, tank leakage cannot be avoided; third, the heat exchanger in the tank is generally made of copper tubing or stainless steel tubing, which in the areas with inferior water quality may be corroded and perforated, leading to refrigerant leakage, which will be fatal for the unit; fourth, since the main engine and the water tank are required to be connected mutually with a connecting tube, it is very difficult to avoid human-made refrigerant leakage in installation; fifth, due to the characteristics of water-storage-type heat pumps, it is required to provide a long period to heat the water up to a higher temperature, which cannot satisfy the requirement of instant water supply, besides, in the later period, the water temperature fluctuates significantly, which may affect the comfort of water use; in addition, since the level of condensation temperature determines the energy consumption of the unit, long-term operation under high condensation temperature and pressure of a traditional unit with a water tank will be a great challenge to the service life of the compressor; sixth, if taking a storage-type water tank, it is generally required to mix water when using water, which may cause several problems: 1) the hot water in the water tank is of low utilization rate; 2) during heat preservation, the water temperature of the water tank drops inevitably, which may increase energy consumption; 3) when installing a water valve at the user's house, it is undoubtedly necessary to mount a water mixing valve, which may increase the material cost; seventh, generally, when the heat for the heating system comes from the water tank, it is required to install a heat exchange coil in the tank to form a closed circuit with a floor heating coil or radiator and circulating water pump, which increases the difficulty of tank manufacturing technology and occupies water tank capacity; eighth, since traditional heating and heat supply systems are not provided with intelligent control, various remote monitoring cannot be conducted, thus being unable to meet more humanized demands of modern people: 1) for example, the user needs to start up the heating system in advance or at a fixed time while no one is at home, so it cannot be realized; 2) if the user has stayed outside for a long time and forgets to cut off the water for heating use, they cannot close the heating system remotely; 3) in case of some faults, traditional heating and heat supply systems require onsite analysis for elimination, especially, in areas with weak after-sale service sites or remote areas, the after-sale service timeliness and the customer satisfaction greatly decreases.

BRIEF SUMMARY OF THE INVENTION

Aiming at the defects and deficiencies of the above art, the present invention proposes an out-of-the-box constant-temperature double-compressor air-source heat pump heating and heat supply system with intelligent control, which features integrated design as well as more convenient production and installation, and can provide heating function while improving water use comfort, so as to realize a diversity of unit functions and networked intelligent remote control, thus meeting more humanized demands of modern people.

To address the abovementioned technical problem, the present invention adopts the follow technical solution:

Provide a double-compressor air-source heat pump heating and heat supply system, including a unit part, a heating part, a heat supply part and an intelligent control part; the unit part includes an air-source heat pump heating part, an electric heating part, a water pipeline fittings part, and a control circuit part; the control circuit part is used for controlling the air-source heat pump heating part on using different compressor combinations according to the detected inflow temperature and ambient temperature; the control circuit part is further used for controlling no output of the electric heating part when detecting that after compressor start-up, the outflow temperature reaches the set temperature; the control circuit part is further used for controlling the electric heating power required for the output of the electric heating part according to the detected inflow and outflow temperature difference as well as the flow quantity detected by the water pipeline fittings part when detecting that the outflow temperature cannot reach the set temperature; the control circuit part is further used for controlling the water pipeline fittings part on regulating the water flow via water flow regulating valve based on the detected temperature to make the water temperature constant when the air-source heat pump heating part and the electric heating part are both of full-power output and the outflow temperature has not reached the set temperature; the control circuit is further used for judging whether it is necessary to execute the heat supply command according to the detected indoor ambient temperature or floor heating coil temperature when receiving a heat supply command, specifically, execute the heat supply function when the indoor ambient temperature or floor heating coil temperature reaches the heat supply-required temperature, and close the function when detecting that the indoor ambient temperature or floor heating coil temperature reaches the shutdown temperature.

Wherein, the air-source heat pump heating part includes a first compressor, a second compressor, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, a sixth solenoid valve, a plate-type centralized heat exchanger, a plate-type heat supply heat exchanger, a first filter, a second filter, an expansion valve, a first evaporator, a second evaporator, a first pressure relief condenser, a second pressure relief condenser, a first pressure-relief throttling capillary, a second pressure-relief throttling capillary, a gas-liquid separator, fan blades, a motor, a first throttling capillary and a defrosting capillary, all of which, after being connected via pipelines, constitute a closed heat pump heating and heat supply system; wherein, the first compressor, the second solenoid valve, the plate-type centralized heat exchanger, the plate-type heat supply heat exchanger, the first filter, the expansion valve, the first evaporator, the gas-liquid separator and the first compressor, all connected in succession, form the first heating and heat supply path of the first compressor system; the first compressor, the sixth solenoid valve, the plate-type heat supply heat exchanger, the first filter, the expansion valve, the first valve, the gas-liquid separator and the first compressor, all connected in succession, form the second heating and heat supply path of the first compressor system; the first compressor, the fourth solenoid valve, the first pressure relief condenser, the first pressure-relief throttling capillary, the first evaporator, the gas-liquid separator and the first compressor, all connected in succession, form the pressure relief path of the first compressor system; the first compressor, the first solenoid valve, the defrosting capillary, the first evaporator, the gas-liquid separator and the first compressor, all connected in succession, form the defrosting path of the first compressor system; the second compressor, the third solenoid valve, the plate-type centralized heat exchanger, the second filter, the first throttling capillary, the second evaporator and the second compressor, all connected in succession, form the heating and heat supply path of the second compressor system; the second compressor, the fifth solenoid valve, the second pressure relief condenser, the second pressure-relief throttling capillary, the second evaporator and the second compressor, all connected in succession, form the pressure relief path of the second compressor system.

Wherein, the electric heating part includes a heating unit component, a thyristor component, a first temperature controller, a second temperature controller, a cabinet, an inlet pipe of heating unit component, an outlet pipe of heating unit component, and a terminal block, etc.

Wherein, the water pipeline fittings part includes a water flow switch, a plate-type centralized heat exchanger, an electric water mixing valve, a water flow meter and a water flow regulating valve, all connected in succession, wherein the water flow regulating valve is connected with the electric heating part.

Wherein, the control circuit includes a main control board and an operation panel, of which the main control board includes an MCU, a temperature detection circuit and an electric heating power control circuit.

Wherein, the control circuit part is further used for controlling the operation of the fourth or the fifth solenoid valve according to the detected outflow temperature when over-temperature phenomenon occurs after selection of the correct compressor combination.

Wherein, the control circuit part is further used for regulating the proportion of heat pump outflow and that of cold water inflow to outflow with the electric water mixing valve when over-temperature occurs after selection of the correct compressor combination.

Wherein, the intelligent control part includes the control circuit as well as a control terminal, a server and a wireless communication module; the server is respectively connected with the control terminal and the wireless communication module via wireless network, wherein the operation panel connects the main control board via the first RS485/232 communication circuit, and the wireless communication module, connected to the main control board through the second RS485/232 communication circuit, communicates with the control terminal via wireless network by taking the server as transfer station.

Wherein, the wireless communication module is integrated with the operation panel.

Wherein, the wireless communication module is integrated with the main control board.

The beneficial effect of the present invention is to propose an out-of-the-box constant-temperature double-compressor air-source heat pump heating and heat supply system with intelligent control, which features integrated design as well as more convenient production and installation, and can provide heating function while improving water use comfort, so as to realize diversity of unit functions and networked intelligent remote control, thus meeting more humanized demands of modern people.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is the schematic view of the double-compressor air-source heat pump heating and heat supply system of the first embodiment of the present invention;

FIG. 2 is the schematic view of the structure of the electric heating part of the present invention;

FIG. 3 is the schematic view of the intelligent control part of an embodiment of the present invention.

SIGNS DESCRIPTION OF MAIN ELEMENTS

-   -   First compressor 1;     -   second compressor 24;     -   second solenoid valve 2;     -   third solenoid valve 25;     -   Fourth solenoid valve 26;     -   fifth solenoid valve 27;     -   first solenoid valve 12;     -   electric heating part 7;     -   First solenoid valve 12;     -   second compressor 24;     -   third solenoid valve 25;     -   fourth solenoid valve 26;     -   Fifth solenoid valve 27;     -   sixth solenoid valve 28;     -   plate-type heat supply heat exchanger 29;     -   First filter 10;     -   second filter 19;     -   expansion valve 11;     -   First evaporator 22;     -   second evaporator 20;     -   first pressure relief condenser 23;     -   second pressure relief condenser 21;     -   First pressure-relief throttling capillary 16;     -   second pressure-relief throttling capillary 17;     -   gas-liquid separator 9;     -   Fan blades 15;     -   motor 14;     -   first throttling capillary 18;     -   defrosting capillary 13;     -   water flow switch 8;     -   Plate-type centralized heat exchanger 3;     -   electric water mixing valve 4;     -   water flow meter 5;     -   water flow regulating valve 6;     -   Outlet pipe of heating unit component 71;     -   heating unit component 72;     -   first temperature controller 73;     -   cabinet 74;     -   Second temperature controller 75;     -   terminal block 76;     -   thyristor component 77;     -   inlet pipe of heating unit component 78;     -   Shower head 201;     -   bathtub 202;     -   circulating water pump 301;     -   water flow switch 303;     -   Floor heating coil or radiator 302.

DETAILED DESCRIPTION OF THE INVENTION

To describe the technical contents, structural features, and realization purposes and effects more clearly, the embodiments will be taken to detail the present invention in combination with the drawings.

As shown in FIG. 1, the schematic view of the double-compressor air-source heat pump heating and heat supply system of the first embodiment of the present invention, the double-compressor air-source heat pump heating & heat supply system includes a unit part, a heating part and a heat supply part.

The unit part includes an air-source heat pump heating part, an electric heating part 7, a water pipeline fittings part and a control circuit part. The control circuit part is used for controlling the air-source heat pump heating part on using different compressor combinations according to the detected inflow temperature and ambient temperature. The control circuit part is further used for controlling no output of the electric heating part when detecting that the outflow temperature reaches the set temperature after compressor start-up; the control circuit part is further used for controlling the electric heating power required for the output of the electric heating part according to the detected inflow and outflow temperature difference as well as the flow quantity detected by the water pipeline fittings part when detecting that the outflow temperature cannot reach the set temperature; the control circuit part is further used for controlling the water pipeline fittings part on regulating the water flow via the water flow regulating valve based on the detected temperature to make the outflow temperature constant when the air-source heat pump heating part and the electric heating part are both of full-power output and the outflow temperature has not reached the set temperature; the control circuit is further used for judging whether it is necessary to execute the heat supply command according to the detected indoor ambient temperature or floor heating coil temperature when receiving the heat supply command, specifically, execute the heat supply function when the indoor ambient temperature or floor heating coil temperature reaches the heat supply-required temperature, and close the function when defecting that the indoor ambient temperature or floor heating temperature reaches the shutdown temperature.

Specifically, the air-source heat pump heating part includes a first compressor 1, a second compressor 24, a second solenoid valve 2, a third solenoid valve 25, a fourth solenoid valve 26, a fifth solenoid valve 27, a first solenoid valve 12, a plate-type centralized heat exchanger 3, a plate-type heat supply heat exchanger 29, a first filter 10, a second filter 19, an expansion valve 11, a first evaporator 22, a second evaporator 20, a first pressure relief condenser 23, a second pressure relief condenser 21, a first pressure-relief throttling capillary 16, a second pressure-relief throttling capillary 17, a gas-liquid separator 9, fan blades 15, a motor 14, a first throttling capillary 18 and a defrosting capillary 13.

The first compressor 1, the second solenoid valve 2, the plate-type centralized heat exchanger 3, the plate-type heat supply heat exchanger 29, the first filter 10, the expansion valve 11, the first evaporator 22, the gas-liquid separator 9 and the first compressor 1 are connected in succession, forming the first heating and heat supply path of the first compressor system. The first compressor 1, the sixth solenoid valve 28, the plate-type heat supply heat exchanger 29, the first filter 10, the expansion valve 11, the first evaporator 22, the gas-liquid separator 9 and the first compressor 1 are connected in succession, forming the second heating and heat supply path of the first compressor system. The first compressor 1, the fourth solenoid valve 26, the first pressure relief condenser 23, the first pressure-relief throttling capillary 16, the first evaporator 22, the gas-liquid separator 9 and the first compressor 1 are connected in succession, forming the pressure relief path of the first compressor system. The second compressor 24, the third solenoid valve 25, the plate-type centralized heat exchanger 3, the second filter 19, the first throttling capillary 18, the second evaporator 20 and the second compressor 24 are connected in succession, forming the heating and heat supply path of the second compressor system. The second compressor 24, the fifth solenoid valve 27, the second pressure relief condenser 21, the second pressure-relief throttling capillary 17, the second evaporator 20 and the second compressor 24 are connected in succession, forming the pressure relief path of the second compressor system. The first compressor 1, the first solenoid valve 12, the defrosting capillary 13, the first evaporator 22, the gas-liquid separator 9 and the first compressor 1 are connected in succession, forming the defrosting path of the first compressor system. During the operation of the above system flow, the fan blades 15 of the motor 14 will start and stop operation as demanded.

The control circuit part includes a main control board and an operation panel, of which the main control board includes an MCU, a temperature detection circuit and an electric heating power control circuit. The control circuit part is further used for controlling the operation of the fourth or the fifth solenoid valve according to the detected outflow temperature when over-temperature phenomenon occurs after selection of the correct compressor combination. The control circuit part is further used for regulating the proportion of heat pump outflow and that of cold water inflow to outflow with the electric water mixing valve when over-temperature occurs after selection of the correct compressor combination.

The water pipeline fittings part includes a water flow switch 8, a plate-type centralized heat exchanger 3, an electric water mixing valve 4, a water flow meter 5 and a water flow regulating valve 6, all connected in succession, wherein the water flow regulating valve 6 is connected with the electric heating part 7. When the MCU detects that the output power can meet the requirement of more inflow, the water will be mixed via the stepper motor of the electric water mixing valve 4 driven by the control circuit part to provide application of large water flow.

As shown in FIG. 2, it is the schematic view of the structure of the electric heating part of the present invention. The electric heating part includes an outlet pipe for heating unit component 71, a heating unit component 72, a first temperature controller 73, a cabinet 74, a second temperature controller 75, a terminal block 76, a thyristor component 77 and an inlet pipe of heating unit component 78. The working principle of the electric heating part is: the outflow water temperature sensor detects the outflow temperature and compares it with the set temperature, then feed the information back to the MCU, which will judge whether it is required to switch on the electric heating part, and after controlling the electricity taking of the heating unit component 72, the MCU will conduct accurate control of the thyristor component 77 and provides the required thermal power, so as to ensure constant outflow.

As shown in FIG. 3, it is the schematic view of the intelligent control part of an embodiment of the present invention. The intelligent control part includes the control circuit as well as a control terminal, a server and a wireless communication module, wherein the server is respectively connected with the control terminal and the wireless communication module via wireless network, the operation panel connects the main control board via the first RS485/232 communication circuit, and the wireless communication module, connected to the main control board through the second RS485/232 communication circuit, communicates with the control terminal via wireless network by taking the server as transfer station. Wherein, in the embodiment, the wireless communication module is integrated with the operation panel, while in another embodiment, it is integrated with the main control board.

The heating part includes a shower head 201 and a bathtub 202, wherein the configuration depends on the actual decoration and installation of the user's house, and the water-using end can meet the water using demands of multiple water using points at the same time. The heat supply part includes a circulating water pump 301, a water flow switch 303 and a floor heating coil or radiator 302. It is acceptable to use floor heating coil and radiator at the same time according to the user's supply demand.

The advantages of the above solution are as below: first, tankless design facilitates installation space saving, convenient installation and safe use; second, tank leakage can be avoided; third, coils inside the tank can be kept from corrosion and perforation which may cause unit scrapping; fourth, decrease of the use of connecting tubes greatly reduces the possibility of refrigerant leakage; fifth, the unit designed in the solution can provide service upon its opening, which saves the water waiting time, and can ensure constant-temperature outflow, improve water use comfort and guarantee continuous water use; under such water use situation, the unit has higher energy efficiency and is more energy-saving, which contributes to safe and stable operation of the heat pump unit, thus ensuring the service life of the unit; sixth, due to tankless design, problem of low utilization rate of hot water will not occur, let alone energy consumption resulting from unsatisfactory heat preservation effect, besides, the design can reduce the user's valve using cost; seventh, while avoiding excess outflow temperature, the design and use of the pressure relief condenser can reduce the unit operation load, thus greatly decreasing the unit energy consumption, which complies with the national energy-saving and emission reduction requirement; eighth, based on the residual power and under the situation of judging that water quantity increase can still ensure constant outflow, conduct by-pass water mixing via electric water mixing valve, which can achieve larger total outflow and more comfortable water use; ninth, it is acceptable to select corresponding compressor based on the size of water load, and to make full use of the heat pump to enhance the heat pump energy efficiency and reduce electricity consumption while ensuring comfortable water use; tenth, on the premise of hot water supply requirement, it is acceptable to select heat supply mode via the operation panel to realize heat supply demand of the room; eleventh, the heating and heat supply system takes double compressors, which can be selected based on the size of water load and in combination with fast-heating system, so as to ensure constant outflow; twelfth, with remote control function, the user can use the control terminal, like mobile phone or other equipment that can be networked, to conduct intelligent control over the heating and heat supply system, thus embodying humanized design of the system.

The description above is only to illustrate the embodiments but not to limit the patent scope of the present invention. Any equivalent structure or procedure substitution based on the Specification and the Drawings of the present invention, or direct or indirect application in other related technical fields shall be all within the protection scope of the present invention. 

What is claimed:
 1. A double-compressor air-source heat pump heating and heat supply system, characterized in that, including a unit part, a heating part, a heat supply part and an intelligent control part; The unit part includes an air-source heat pump heating part, an electric heating part, a water pipeline fittings part, and a control circuit part; the control circuit part is used for controlling the air-source heat pump heating part on using different compressor combinations according to the detected inflow temperature and ambient temperature; the control circuit part is further used for controlling no output of the electric heating part when detecting that after compressor start-up, the outflow temperature reaches the set temperature; the control circuit part is further used for controlling the electric heating power required for the output of the electric heating part according to the detected inflow and outflow temperature difference as well as the flow quantity detected by the water pipeline fittings part when detecting that the outflow temperature cannot reach the set temperature; the control circuit part is further used for controlling the water pipeline fittings part on regulating the water flow via water flow regulating valve based on the detected temperature to make the water temperature constant when the air-source heat pump heating part and the electric heating part are both of full-power output and the outflow temperature has not reached the set temperature; the control circuit is further used for judging whether it is necessary to execute the heat supply command according to the detected indoor ambient temperature or floor heating coil temperature when receiving a heat supply command, specifically, execute the heat supply function when the indoor ambient temperature or floor heating coil temperature reaches the heat supply-required temperature, and close the heat supply function when detecting that the indoor ambient temperature or floor heating coil temperature reaches the shutdown temperature.
 2. The double-compressor air-source heat pump heating and heat supply system according to claim 1, characterized in that, the air-source heat pump heating part includes a first compressor, a second compressor, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, a sixth solenoid valve, a plate-type centralized heat exchanger, a plate-type heat supply heat exchanger, a first filter, a second filter, an expansion valve, a first evaporator, a second evaporator, a first pressure relief condenser, a second pressure relief condenser, a first pressure-relief throttling capillary, a second pressure-relief throttling capillary, a gas-liquid separator, fan blades, a motor, a first throttling capillary and a defrosting capillary, all of which are connected via pipelines, forming a closed heat pump heating and heat supply system; wherein, the first compressor, the second solenoid valve, the plate-type centralized heat exchanger, the plate-type heat supply heat exchanger, the first filter, the expansion valve, the first evaporator, the gas-liquid separator and the first compressor, all connected in succession, form the first heating and heat supply path of the first compressor system; the first compressor, the sixth solenoid valve, the plate-type heat supply heat exchanger, the first filter, the expansion valve, the first evaporator, the gas-liquid separator and the first compressor, all connected in succession, form the second heating and heat supply path of the first compressor system; The first compressor, the fourth solenoid valve, the first pressure relief condenser, the first pressure-relief throttling capillary, the first evaporator, the gas-liquid separator and the first compressor, all connected in succession, form the pressure relief path of the first compressor system; the first compressor, the first solenoid valve, the defrosting capillary, the first evaporator, the gas-liquid separator and the first compressor, all connected in succession, form the defrosting path of the first compressor system; the second compressor, the third solenoid valve, the plate-type centralized heat exchanger, the second filter, the first throttling capillary, the second evaporator and the second compressor, all connected in succession, form the heating and heat supply path of the second compressor system; the second compressor, the fifth solenoid valve, the second pressure relief condenser, the second pressure-relief throttling capillary, the second evaporator and the second compressor, all connected in succession, form the pressure relief path of the second compressor system;
 3. The double-compressor air-source heat pump heating and heat supply system according to claim 1, characterized in that, the electric heating part includes a heating unit component, a thyristor component, a first temperature controller, a second temperature controller, a cabinet, an inlet pipe of heating unit component, an outlet pipe of a heating unit component and a terminal block, etc.
 4. The double-compressor air-source heat pump heating and heat supply system according to claim 1, characterized in that, the water pipeline fittings part includes a water flow switch, a plate-type centralized heat exchanger, an electric water mixing valve, a water flow meter and a water flow regulating valve, all connected in succession, wherein, the water flow regulating valve is connected with the electric heating part.
 5. The double-compressor air-source heat pump heating and heat supply system according to claim 1, characterized in that, the control circuit includes a main control board and an operation panel, wherein the main control board includes an MCU, a temperature detection circuit and an electric heating power control circuit.
 6. The double-compressor air-source heat pump heating and heat supply system according to claim 2, characterized in that, the control circuit part is further used for controlling the operation of the fourth or the fifth solenoid valve according to the detected outflow temperature when over-temperature phenomenon occurs after selecting correct compressor combination.
 7. The double-compressor air-source heat pump heating and heat supply system according to claim 4, characterized in that, the control circuit part is further used for regulating the proportion of heat pump outflow and that of cold water inflow to outflow with the electric water mixing valve when over-temperature phenomenon occurs after selecting correct compressor combination.
 8. The double-compressor air-source heat pump heating and heat supply system according to claim 5, characterized in that, the intelligent control part includes the control circuit as well as a control terminal, a server and a wireless communication module; wherein the server is respectively connected with the control terminal and the wireless communication module via wireless network, the operation panel connects the main control board via the first RS485/232 communication circuit, and the wireless communication module, connected to the main control board through the second RS485/232 communication circuit, communicates with the control terminal via wireless network by taking the server as transfer station.
 9. The double-compressor air-source heat pump heating and heat supply system according to claim 8, characterized in that, the wireless communication module is integrated with the operation panel.
 10. The double-compressor air-source heat pump heating and heat supply system according to claim 8, characterized in that, the wireless communication module is integrated with the main control board. 